Help with border alignment

Hi, I'm a CSS novice and I'm working with a template that is being developed for using in the html editor in online courses. I've got something that seems to work in BB Learn, but it doesn't work in any other LMS. What happens is the bottom border of the box cuts right through the middle of the text instead of extending to the bottom of it. What's the best way to share this? Pictures of the results? The code I'm using? The forum won't let me post the code since there's a URL to an image in it.